Malware analysis 231ae4c87c3c2766bb7643dfd88e482f019467a6fda13feb5656a8d0d4fd746a Malicious activity

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File name:	231ae4c87c3c2766bb7643dfd88e482f019467a6fda13feb5656a8d0d4fd746a
Full analysis:	https://app.any.run/tasks/b72ff18e-c7d0-4b74-9d1f-d67dfd40b59e
Verdict:	Malicious activity
Threats:	Stealc is a stealer malware that targets victims’ sensitive data, which it exfiltrates from browsers, messaging apps, and other software. The malware is equipped with advanced features, including fingerprinting, control panel, evasion mechanisms, string obfuscation, etc. Stealc establishes persistence and communicates with its C2 server through HTTP POST requests. Stealc ist eine Stealer-Malware, die es auf die sensiblen Daten der Opfer abgesehen hat, die sie aus Browsern, Messaging-Apps und anderer Software exfiltriert. Die Malware ist mit fortschrittlichen Funktionen ausgestattet, darunter Fingerprinting, Bedienfeld, Umgehungsmechanismen, String-Verschleierung usw. Stealc stellt eine Persistenz her und kommuniziert mit seinem C2-Server über HTTP-POST-Anfragen. Stealers are a group of malicious software that are intended for gaining unauthorized access to users’ information and transferring it to the attacker. The stealer malware category includes various types of programs that focus on their particular kind of data, including files, passwords, and cryptocurrency. Stealers are capable of spying on their targets by recording their keystrokes and taking screenshots. This type of malware is primarily distributed as part of phishing campaigns. Malware Trends Tracker >>>
Analysis date:	May 19, 2025, 16:21:58
OS:	Windows 10 Professional (build: 19044, 64 bit)
Tags:	stealc stealer
Indicators:
MIME:	application/vnd.microsoft.portable-executable
File info:	PE32 executable (GUI) Intel 80386, for MS Windows, 3 sections
MD5:	9765669AEA3B4DDE794ECEBEF90EF845
SHA1:	DFC75656C7C7D4F685E1C96E37C78637E859C1B5
SHA256:	231AE4C87C3C2766BB7643DFD88E482F019467A6FDA13FEB5656A8D0D4FD746A
SSDEEP:	6144:mLK/FjiWXaLERwcy00XYUSJBu8vLEr4Sb3paSGnv8OKqeveNwt:mIvXaLEucyrYHJB5LEtrpaSOwt

ANY.RUN is an interactive service which provides full access to the guest system. Information in this report could be distorted by user actions and is provided for user acknowledgement as it is. ANY.RUN does not guarantee maliciousness or safety of the content.

Launch configuration

Task duration:: 60 seconds
Heavy Evasion option:: off
Network geolocation:: off
Additional time used:: none
MITM proxy:: off
Privacy:: Public submission
Fakenet option:: off
Route via Tor:: off
Autoconfirmation of UAC:: on
Network:: on

Software preset

Internet Explorer 11.3636.19041.0
Adobe Acrobat (64-bit) (23.001.20093)
Adobe Flash Player 32 NPAPI (32.0.0.465)
Adobe Flash Player 32 PPAPI (32.0.0.465)
CCleaner (6.20)
FileZilla 3.65.0 (3.65.0)
Google Chrome (122.0.6261.70)
Google Update Helper (1.3.36.51)
Java 8 Update 271 (64-bit) (8.0.2710.9)
Java Auto Updater (2.8.271.9)
Microsoft Edge (122.0.2365.59)
Microsoft Edge Update (1.3.185.17)
Microsoft Office Professional 2019 - de-de (16.0.16026.20146)
Microsoft Office Professional 2019 - en-us (16.0.16026.20146)
Microsoft Office Professional 2019 - es-es (16.0.16026.20146)
Microsoft Office Professional 2019 - it-it (16.0.16026.20146)
Microsoft Office Professional 2019 - ja-jp (16.0.16026.20146)
Microsoft Office Professional 2019 - ko-kr (16.0.16026.20146)
Microsoft Office Professional 2019 - pt-br (16.0.16026.20146)
Microsoft Office Professional 2019 - tr-tr (16.0.16026.20146)
Microsoft Office Professionnel 2019 - fr-fr (16.0.16026.20146)
Microsoft Office профессиональный 2019 - ru-ru (16.0.16026.20146)
Microsoft OneNote - en-us (16.0.16026.20146)
Microsoft Update Health Tools (3.74.0.0)
Microsoft Visual C++ 2013 Redistributable (x64) - 12.0.30501 (12.0.30501.0)
Microsoft Visual C++ 2013 x64 Additional Runtime - 12.0.21005 (12.0.21005)
Microsoft Visual C++ 2013 x64 Minimum Runtime - 12.0.21005 (12.0.21005)
Microsoft Visual C++ 2015-2022 Redistributable (x64) - 14.36.32532 (14.36.32532.0)
Microsoft Visual C++ 2015-2022 Redistributable (x86) - 14.36.32532 (14.36.32532.0)
Microsoft Visual C++ 2022 X64 Additional Runtime - 14.36.32532 (14.36.32532)
Microsoft Visual C++ 2022 X64 Minimum Runtime - 14.36.32532 (14.36.32532)
Microsoft Visual C++ 2022 X86 Additional Runtime - 14.36.32532 (14.36.32532)
Microsoft Visual C++ 2022 X86 Minimum Runtime - 14.36.32532 (14.36.32532)
Mozilla Firefox (x64 en-US) (123.0)
Mozilla Maintenance Service (123.0)
Notepad++ (64-bit x64) (7.9.1)
Office 16 Click-to-Run Extensibility Component (16.0.15726.20202)
Office 16 Click-to-Run Licensing Component (16.0.16026.20146)
Office 16 Click-to-Run Localization Component (16.0.15726.20202)
Office 16 Click-to-Run Localization Component (16.0.15928.20198)
PowerShell 7-x64 (7.3.5.0)
Skype version 8.104 (8.104)
Update for Windows 10 for x64-based Systems (KB4023057) (2.59.0.0)
Update for Windows 10 for x64-based Systems (KB4023057) (2.63.0.0)
Update for Windows 10 for x64-based Systems (KB4480730) (2.55.0.0)
Update for Windows 10 for x64-based Systems (KB5001716) (8.93.0.0)
VLC media player (3.0.11)
WinRAR 5.91 (64-bit) (5.91.0)
Windows PC Health Check (3.6.2204.08001)

Hotfixes

Client LanguagePack Package
DotNetRollup
DotNetRollup 481
FodMetadata Package
Foundation Package
Hello Face Package
InternetExplorer Optional Package
KB5003791
KB5011048
KB5015684
KB5033052
LanguageFeatures Basic en us Package
LanguageFeatures Handwriting en us Package
LanguageFeatures OCR en us Package
LanguageFeatures Speech en us Package
LanguageFeatures TextToSpeech en us Package
MSPaint FoD Package
MediaPlayer Package
Microsoft OneCore ApplicationModel Sync Desktop FOD Package
Microsoft OneCore DirectX Database FOD Package
NetFx3 OnDemand Package
Notepad FoD Package
OpenSSH Client Package
PowerShell ISE FOD Package
Printing PMCPPC FoD Package
Printing WFS FoD Package
ProfessionalEdition
QuickAssist Package
RollupFix
ServicingStack
ServicingStack 3989
StepsRecorder Package
TabletPCMath Package
UserExperience Desktop Package
WordPad FoD Package

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MALICIOUS
- STEALC mutex has been found
  - 231ae4c87c3c2766bb7643dfd88e482f019467a6fda13feb5656a8d0d4fd746a.exe (PID: 5404)
- STEALC has been detected
  - 231ae4c87c3c2766bb7643dfd88e482f019467a6fda13feb5656a8d0d4fd746a.exe (PID: 5404)
SUSPICIOUS
- Windows Defender mutex has been found
  - 231ae4c87c3c2766bb7643dfd88e482f019467a6fda13feb5656a8d0d4fd746a.exe (PID: 5404)
- Executes application which crashes
  - 231ae4c87c3c2766bb7643dfd88e482f019467a6fda13feb5656a8d0d4fd746a.exe (PID: 5404)
INFO
- Reads the computer name
  - 231ae4c87c3c2766bb7643dfd88e482f019467a6fda13feb5656a8d0d4fd746a.exe (PID: 5404)
- Checks supported languages
  - 231ae4c87c3c2766bb7643dfd88e482f019467a6fda13feb5656a8d0d4fd746a.exe (PID: 5404)
- Creates files or folders in the user directory
  - WerFault.exe (PID: 5972)

Find more information about signature artifacts and mapping to MITRE ATT&CK™ MATRIX at the full report

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No Malware configuration.

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TRiD

.exe	\|	Win32 Executable MS Visual C++ (generic) (42.2)
.exe	\|	Win64 Executable (generic) (37.3)
.dll	\|	Win32 Dynamic Link Library (generic) (8.8)
.exe	\|	Win32 Executable (generic) (6)
.exe	\|	Generic Win/DOS Executable (2.7)

EXIF

EXE

MachineType:	Intel 386 or later, and compatibles
TimeStamp:	2022:07:15 04:34:07+00:00
ImageFileCharacteristics:	No relocs, Executable, 32-bit
PEType:	PE32
LinkerVersion:	10
CodeSize:	180736
InitializedDataSize:	3796992
UninitializedDataSize:	-
EntryPoint:	0x7eb5
OSVersion:	5.1
ImageVersion:	-
SubsystemVersion:	5.1
Subsystem:	Windows GUI
FileVersionNumber:	8.0.0.0
ProductVersionNumber:	36.0.0.0
FileFlagsMask:	0x003f
FileFlags:	(none)
FileOS:	Windows NT 32-bit
ObjectFileType:	Executable application
FileSubtype:	-
LanguageCode:	Unknown (0371)
CharacterSet:	Unknown (65B1)
FileDescriptions:	Nuts
InternalName:	Buckiyarn.exe
LegalTrademark1:	Gurumess
LegalTrademarks2:	Gunshutting
OriginalFileName:	Buskebaser.exe
ProductVersion:	76.47.92.28

No data.

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All screenshots are available in the full report

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Total processes

133

Monitored processes

Malicious processes

Suspicious processes

Behavior graph

Click at the process to see the details

Process information

PID

CMD

Path

Indicators

Parent process

1272

C:\WINDOWS\system32\SppExtComObj.exe -Embedding

C:\Windows\System32\SppExtComObj.Exe

—

svchost.exe

User:

NETWORK SERVICE

Company:

Microsoft Corporation

Integrity Level:

SYSTEM

Description:

KMS Connection Broker

Version:

10.0.19041.3996 (WinBuild.160101.0800)

Modules

Images
c:\windows\system32\sppextcomobj.exe
c:\windows\system32\ntdll.dll
c:\windows\system32\kernel32.dll
c:\windows\system32\kernelbase.dll
c:\windows\system32\advapi32.dll
c:\windows\system32\msvcrt.dll
c:\windows\system32\sechost.dll
c:\windows\system32\rpcrt4.dll
c:\windows\system32\bcrypt.dll
c:\windows\system32\oleaut32.dll

5404

"C:\Users\admin\AppData\Local\Temp\231ae4c87c3c2766bb7643dfd88e482f019467a6fda13feb5656a8d0d4fd746a.exe"

C:\Users\admin\AppData\Local\Temp\231ae4c87c3c2766bb7643dfd88e482f019467a6fda13feb5656a8d0d4fd746a.exe

explorer.exe

User:

admin

Integrity Level:

MEDIUM

Exit code:

3221225477

Modules

Images
c:\users\admin\appdata\local\temp\231ae4c87c3c2766bb7643dfd88e482f019467a6fda13feb5656a8d0d4fd746a.exe
c:\windows\system32\ntdll.dll
c:\windows\syswow64\ntdll.dll
c:\windows\system32\wow64.dll
c:\windows\system32\wow64win.dll
c:\windows\system32\wow64cpu.dll
c:\windows\syswow64\kernel32.dll
c:\windows\syswow64\kernelbase.dll
c:\windows\syswow64\apphelp.dll
c:\windows\syswow64\user32.dll

5972

C:\WINDOWS\SysWOW64\WerFault.exe -u -p 5404 -s 380

C:\Windows\SysWOW64\WerFault.exe

—

231ae4c87c3c2766bb7643dfd88e482f019467a6fda13feb5656a8d0d4fd746a.exe

User:

admin

Company:

Microsoft Corporation

Integrity Level:

MEDIUM

Description:

Windows Problem Reporting

Exit code:

Version:

10.0.19041.3996 (WinBuild.160101.0800)

Modules

Images
c:\windows\syswow64\werfault.exe
c:\windows\system32\ntdll.dll
c:\windows\syswow64\ntdll.dll
c:\windows\system32\wow64.dll
c:\windows\system32\wow64win.dll
c:\windows\system32\wow64cpu.dll
c:\windows\syswow64\kernel32.dll
c:\windows\syswow64\kernelbase.dll
c:\windows\syswow64\msvcrt.dll
c:\windows\syswow64\combase.dll

6392

"C:\WINDOWS\System32\SLUI.exe" RuleId=3482d82e-ca2c-4e1f-8864-da0267b484b2;Action=AutoActivate;AppId=55c92734-d682-4d71-983e-d6ec3f16059f;SkuId=4de7cb65-cdf1-4de9-8ae8-e3cce27b9f2c;NotificationInterval=1440;Trigger=TimerEvent

C:\Windows\System32\slui.exe

—

SppExtComObj.Exe

User:

NETWORK SERVICE

Company:

Microsoft Corporation

Integrity Level:

SYSTEM

Description:

Windows Activation Client

Version:

10.0.19041.1 (WinBuild.160101.0800)

Modules

Images
c:\windows\system32\slui.exe
c:\windows\system32\ntdll.dll
c:\windows\system32\kernel32.dll
c:\windows\system32\kernelbase.dll
c:\windows\system32\advapi32.dll
c:\windows\system32\msvcrt.dll
c:\windows\system32\sechost.dll
c:\windows\system32\rpcrt4.dll
c:\windows\system32\bcrypt.dll
c:\windows\system32\user32.dll

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Total events

1 767

Read events

1 767

Write events

Delete events

Modification events

No data

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Executable files

Suspicious files

Text files

Unknown types

Dropped files

PID	Process	Filename		Type
5972	WerFault.exe	C:\ProgramData\Microsoft\Windows\WER\ReportQueue\AppCrash_231ae4c87c3c2766_7db43a9eb39152edbd50ffb7e439ec47d1efa5_c8061d20_d53f6b4a-682f-4cbc-97aa-cb1234ac03a5\Report.wer		—
		MD5:—	SHA256:—
5972	WerFault.exe	C:\ProgramData\Microsoft\Windows\WER\Temp\WERE245.tmp.WERInternalMetadata.xml		binary
		MD5:10EB9A932B51A1D5FA601A217B372024	SHA256:0E283866A76AFA572769A59C0958D01265B99C067EBE885FF4A92D23E0230E25
5972	WerFault.exe	C:\ProgramData\Microsoft\Windows\WER\Temp\WERE320.tmp.xml		xml
		MD5:1B999FE3207F2398CDF52A559DAB72EE	SHA256:51505968A79DA00373D3369E275ADE0A3F0564BD60A5E7803CE20B8F21296D0E
5972	WerFault.exe	C:\Users\admin\AppData\Local\CrashDumps\231ae4c87c3c2766bb7643dfd88e482f019467a6fda13feb5656a8d0d4fd746a.exe.5404.dmp		binary
		MD5:6FFC47315D19132A9D4C68E7D9B1AF20	SHA256:9DF06AAF9F70DEBBCC3F0AD897C73CA5CF541E2D4ED6E1D1205D811F491A31AA
5972	WerFault.exe	C:\ProgramData\Microsoft\Windows\WER\Temp\WERE14A.tmp.dmp		binary
		MD5:6B39B69394B8CD580F1BBEA7D043E2F8	SHA256:63327F4A1143AA14850FB35353B1F875CDF156F311774FD8F9E6B644BCA9057C

Download PCAP, analyze network streams, HTTP content and a lot more at the full report

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HTTP(S) requests

TCP/UDP connections

DNS requests

Threats

HTTP requests

PID	Process	Method	HTTP Code	IP	URL	CN	Type	Size	Reputation
5496	MoUsoCoreWorker.exe	GET	200	23.216.77.23:80	http://crl.microsoft.com/pki/crl/products/MicRooCerAut2011_2011_03_22.crl	unknown	—	—	whitelisted
5496	MoUsoCoreWorker.exe	GET	200	184.30.21.171:80	http://www.microsoft.com/pkiops/crl/MicSecSerCA2011_2011-10-18.crl	unknown	—	—	whitelisted
6700	SIHClient.exe	GET	200	2.23.246.101:80	http://www.microsoft.com/pkiops/crl/Microsoft%20ECC%20Update%20Secure%20Server%20CA%202.1.crl	unknown	—	—	whitelisted
6700	SIHClient.exe	GET	200	2.23.246.101:80	http://www.microsoft.com/pkiops/crl/Microsoft%20ECC%20Product%20Root%20Certificate%20Authority%202018.crl	unknown	—	—	whitelisted
6544	svchost.exe	GET	200	2.17.190.73:80	http://ocsp.digicert.com/MFEwTzBNMEswSTAJBgUrDgMCGgUABBSAUQYBMq2awn1Rh6Doh%2FsBYgFV7gQUA95QNVbRTLtm8KPiGxvDl7I90VUCEAJ0LqoXyo4hxxe7H%2Fz9DKA%3D	unknown	—	—	whitelisted

Download PCAP, analyze network streams, HTTP content and a lot more at the full report

Connections

PID	Process	IP	Domain	ASN	CN	Reputation
—	—	51.124.78.146:443	settings-win.data.microsoft.com	MICROSOFT-CORP-MSN-AS-BLOCK	NL	whitelisted
4	System	192.168.100.255:138	—	—	—	whitelisted
5496	MoUsoCoreWorker.exe	23.216.77.23:80	crl.microsoft.com	Akamai International B.V.	DE	whitelisted
5496	MoUsoCoreWorker.exe	184.30.21.171:80	www.microsoft.com	AKAMAI-AS	DE	whitelisted
—	—	172.211.123.249:443	client.wns.windows.com	MICROSOFT-CORP-MSN-AS-BLOCK	FR	whitelisted
6544	svchost.exe	20.190.159.64:443	login.live.com	MICROSOFT-CORP-MSN-AS-BLOCK	IE	whitelisted
6544	svchost.exe	2.17.190.73:80	ocsp.digicert.com	AKAMAI-AS	DE	whitelisted
2104	svchost.exe	4.231.128.59:443	settings-win.data.microsoft.com	MICROSOFT-CORP-MSN-AS-BLOCK	IE	whitelisted
4	System	192.168.100.255:137	—	—	—	whitelisted
6700	SIHClient.exe	172.202.163.200:443	slscr.update.microsoft.com	MICROSOFT-CORP-MSN-AS-BLOCK	GB	whitelisted

DNS requests

Domain	IP	Reputation
google.com	142.250.185.206	whitelisted
settings-win.data.microsoft.com	51.124.78.146 4.231.128.59	whitelisted
crl.microsoft.com	23.216.77.23 23.216.77.30 23.216.77.29 23.216.77.26 23.216.77.20 23.216.77.28 23.216.77.12 23.216.77.22 23.216.77.21	whitelisted
www.microsoft.com	184.30.21.171 2.23.246.101	whitelisted
client.wns.windows.com	172.211.123.249	whitelisted
login.live.com	20.190.159.64 40.126.31.2 20.190.159.128 20.190.159.0 20.190.159.73 20.190.159.129 40.126.31.131 20.190.159.71	whitelisted
ocsp.digicert.com	2.17.190.73	whitelisted
slscr.update.microsoft.com	172.202.163.200	whitelisted
fe3cr.delivery.mp.microsoft.com	52.165.164.15	whitelisted

Threats

No threats detected

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No debug info

General Info

231ae4c87c3c2766bb7643dfd88e482f019467a6fda13feb5656a8d0d4fd746a

9765669AEA3B4DDE794ECEBEF90EF845

DFC75656C7C7D4F685E1C96E37C78637E859C1B5

231AE4C87C3C2766BB7643DFD88E482F019467A6FDA13FEB5656A8D0D4FD746A

6144:mLK/FjiWXaLERwcy00XYUSJBu8vLEr4Sb3paSGnv8OKqeveNwt:mIvXaLEucyrYHJB5LEtrpaSOwt

Software environment set and analysis options

Launch configuration

Software preset

Hotfixes

Behavior activities

MALICIOUS

STEALC mutex has been found

STEALC has been detected

SUSPICIOUS

Windows Defender mutex has been found

Executes application which crashes

INFO

Reads the computer name

Checks supported languages

Creates files or folders in the user directory

Malware configuration

Static information

TRiD

EXIF

EXE

Video and screenshots

Processes

Behavior graph

Specs description

Process information

Information

Modules

Information

Modules

Information

Modules

Information

Modules

Registry activity

Modification events

Files activity

Dropped files

Network activity

HTTP requests

Connections

DNS requests

Threats

Debug output strings